Digital signal encoding method and apparatus and recording mediu

Details Digital signal encoding method and apparatus and recording mediu Digital signal encoding method and apparatus and recording mediu

1995-10-25

1997-08-05

Huber, P. W.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369 47, 395 291, G11B 700, G11B 509, G10L 302

Patent

active

056549520

ABSTRACT:
A digital signal compressing device includes a unit for dividing an input signal into plural bands duping information compression, a unit for producing frequency-domain data of the input signal divided into plural bands, and a unit for operating on frequency-domain characteristics. The unit for operating on frequency-domain characteristics operates on the frequency-domain characteristics so that the condition of canceling the aliasing noise by the frequency division and subsequent frequency synthesis performed by a synthesis filter in association with the division at the time of information expansion will be maintained. The frequency-domain characteristics of the input signal can be acted on easily without obstructing the condition of canceling the aliasing noise without requiring a new mechanism or device other than the information compressing mechanism or device.

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